A 0250 M Aqueous Solution of P -Toluic Acid Has a a PH

question 12

Multiple Choice

A 0.250 M aqueous solution of p -toluic acid has a pH of 2.49. What is K _a for this weak acid?

• A) 4.2×10 ^{- 5}
• B) 3.2×10 ^{- 3}
• C) 1.3×10 ^{- 2}
• D) 2.4×10 ^{- 10}
• E) 1.0×10 ^{- 5}

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